ARTAJONA Wastewater Treatment Plant, Artajona, Navarre, Spain

ARTAJONA is a wastewater treatment plant located in the town of Artajona, in the Izarbeibar-Novenera region of Navarre, Spain. The plant serves a population of approximately 1,700 residents and is part of the municipal wastewater infrastructure for this inland community. The plant operates at the secondary treatment level, which is the standard required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations with a population equivalent between 2,000 and 10,000. With a designed capacity of 3,400 m³/day and a current discharge volume of 595 m³/day, the facility has ample capacity to handle current loads. The treated effluent is discharged into the local watershed, which ultimately drains into the Ebro River basin. The Ebro River flows eastward into the Mediterranean Sea, supporting diverse aquatic ecosystems along its course. The plant's secondary treatment helps protect downstream water quality in this important agricultural region.

The plant discharges into the Ebro River basin, which flows through northeastern Spain into the Mediterranean Sea. This watershed supports irrigated agriculture and diverse aquatic habitats. Secondary treatment reduces organic pollutants and suspended solids, helping to maintain water quality in the Ebro River and its delta, an ecologically sensitive area for migratory birds and fish species.